GGD1 / GGD2 / GGD3 AC Low-Voltage Reactive Power Compensation Cabinet

1. Product Overview

GGD series compensation cabinet is fixed-type low-voltage power factor correction switchgear for AC 50/60Hz, 400V three-phase four-wire distribution systems, complying with IEC 60439-1 and GB 7251.1 standards. Equipped with 8MF cold-bent steel frame and IP30 protection, it is paralleled to main busbars to automatically compensate reactive power, boost power factor, cut power loss and avoid utility penalties. Matched with transformers, main incoming, bus coupler and feeder cabinets, it widely serves factories, commercial complexes, substations and overseas power projects. GGD1/2/3 differ in short-circuit withstand capacity and bus current for small, medium and large load scenarios separately.

2. Standard Internal Configuration

1. Reactive Power Automatic Controller: Real-time monitors power factor, auto switches capacitor groups on/off.
2. Low-Voltage Capacitor Banks: Self-healing type, stable reactive output, long service life.
3. Series Reactors: Suppress harmonic amplification, protect capacitors from surge currentMade-in-Ch….
4. AC Contactors & Fuses: Branch overcurrent & short-circuit protection for each capacitor loop.
5. Main Copper Busbar: Top-through L1/L2/L3, independent N neutral and PE grounding busbar with tinned joints.
6. Measuring Meters & Indicators: Power factor meter, ammeter, running/fault signal lights.
7. SPD Surge Protector: Block lightning and switching overvoltage to protect capacitor components.

3. Technical Parameter Comparison

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4. Working Principle

The cabinet is directly connected to low-voltage main busbars in parallel. The built-in controller collects voltage and current signals from the main incoming CT to calculate real-time power factor.

• If power factor is below target value, the controller switches on capacitor groups to supply local reactive power, reduce reactive current from grid;
• If power factor exceeds the set value, capacitors are cut off to avoid over-compensation;
• Series reactors restrain harmonic resonance and inrush current to extend capacitor lifespan;
• Multi-layer protection prevents short-circuit, overvoltage and overheating faults.

5. Core Selling Points for Foreign Trade Website

1. Full model coverage: GGD1 for light loads, GGD2 universal standard, GGD3 high-current heavy industry.
2. Intelligent automatic compensation, stably maintain power factor above 0.95, save electricity costs.
3. Harmonic suppression design with reactors, adapt to industrial loads with variable harmonics.
4. Optimized heat dissipation structure with upper & lower ventilation slots, stable long-term operationAlibaba.co….
5. High safety: IP30 protection, independent PE busbar, complete multi-level circuit protection.
6. Flexible system combination, seamlessly matched with full set of GGD low-voltage cabinets.
7. Customizable for global markets: 50/60Hz switchable, English nameplates and panels, various kvar capacity options.
8. Cost-effective fixed structure, low procurement and maintenance cost vs withdrawable switchgear.

6. Application Scenarios

• GGD1 Compensation Cabinet: Small workshops, residential districts, mini malls, transformers under 1000kVA.
• GGD2 Compensation Cabinet: Medium manufacturing plants, office buildings, commercial plazas, 1000~2000kVA transformers.
• GGD3 Compensation Cabinet: Heavy industry, data centers, central substations, photovoltaic energy storage stations with ≥2000kVA transformers.

7. Operating Environment

1. Ambient temperature: -5℃ ~ +40℃, average 24h temperature ≤35℃.
2. Altitude: ≤2000m above sea level.
3. Humidity: ≤50% RH at 40℃; ≤90% RH at 20℃, no internal condensation.
4. Installation: Indoor dry & ventilated space, no corrosive gas or heavy dust; cabinet vertical tilt ≤5°.

Short Version (≈100 words for product list)

GGD series reactive power compensation cabinets fit 400V 50/60Hz three-phase four-wire systems, complying with IEC 60439-1. With 8MF steel frames and IP30 rating, they use auto controllers, capacitors and reactors to lift power factor and reduce grid loss. GGD1/2/3 vary in short-circuit resistance and rated current for small, medium and large loads. Parallel-connected to main busbars, they feature multi-layer protection, good heat dissipation and flexible combination with other GGD cabinets, customizable for global projects.